a+b-x/x^2

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Solution for a+b-x/x^2 equation: 


D( x )

x^2 = 0

x^2 = 0

x^2 = 0

1*x^2 = 0 // : 1

x^2 = 0

x = 0

x in (-oo:0) U (0:+oo)

a+b-(x/(x^2)) = 0

a+b-x^-1 = 0

-1*x^-1 = -(a+b) // : -1

x^-1 = a+b

-1 < 0

1/(x^1) = a+b // * x^1

1 = x^1*(a+b) // : a+b

1/(a+b) = x^1

x = 1/(a+b)

x = 1/(a+b)

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